this may not be it, but, have you ever been checked to see if maybe it could be your trigeminal nerve? it's a nerve that has three branches. one runs over the eye area, the other, over the nose area and the other over the teeth area. does air bother you? TN can cause severe shocking pain in the cheek also. just a suggestion. lol
Having tooth and gum problems has been strongly associated with pregnancy problems such as preterm labor and early delivery. Some theorize that it has to do with a constant level of harmful bacteria seeding the bloodstream from the infected gums. YOu could even get an infection around the placenta and membranes from this.
I also STRONGLY suggest that you see an oral surgeon. Your pregnancy outcome may be affected if you don't.
This problem has nothiong to do with the pregnancy. I would suggest very strongly that you see your dentist for a comprehensive exam and treatment.